(1)证明:在△CDF和△CBE中,∠CDA=90°,∴∠CDF=90°∴∠CDF=∠CBE=90°∴ CD=CB ∠CDF=∠CBE DF=BE ,∴△CDF≌△CBE,∴CF=CE.(2)解:∵△CDF≌△CBE,∴∠DCF=∠BCE,∴∠ECF=90°,∵CF=CE,∴∠CEF=45°.